介绍了闭合电路欧姆定律投影实验器的研制和使用方法。
This article introduces the manufacture and application methods of the projection experimenter of "Closed Circuit Ohm Law".
双电磁系统控制电路确保两台并联接触器的同步闭合和无声节电运行。
Its control circuit with double electromagnetic system can ensure synchronous closing, silent and energy saving operation of two contactors in parallel.
WTZK型温度控制器是可随被控介质温度变化而使电路闭合或断开的电开关。
WTZK type temp, controller is an electrical switch that can make circuit close or open following change of controlled medium temp.
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